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Button

raspbot.sensors.button.Button

Reader for the KEY1 tactile button on the Raspbot V2.

The button state is polled on demand -- no background thread or interrupt is used. Register 0x0D returns 1 when pressed, 0 when released.

Access via Robot.button.

Methods

is_pressed()

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def is_pressed(self) -> bool

Return True if the button is currently held down.

Examples

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from raspbot import Robot

with Robot() as bot:
    if bot.button.is_pressed():
        print("Button is held down")

Wait for a button press

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import time
from raspbot import Robot

with Robot() as bot:
    print("Press the button...")
    while not bot.button.is_pressed():
        time.sleep(0.02)
    print("Button pressed!")

Non-blocking polling

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import time
from raspbot import Robot, Task

with Robot() as bot:
    @Task.every(0.1)
    def check_button(ct: float) -> None:
        if bot.button.is_pressed():
            bot.buzzer.beep(0.05)

    end = time.monotonic() + 30.0
    while time.monotonic() < end:
        check_button(time.monotonic())
        time.sleep(0.001)

See also